Here is the full list of all 39 HELLDIVERS achievements.
Fully upgrade all non DLC Weapons and Stratagems.
Defeat a Bug Hive Lord.
Complete a difficulty 4 or higher mission in 5 minutes or less.
Complete a mission with over 300 shots fired and 80% accuracy or better.
In a 4 player game, on a Friday, have all players sitting in an APC or HAV at the same time.
Achieve the rank of Grand Lord (Rank 25).
Kill an Illuminate Obelisk while it is closed.
Defeat an Illuminate Great Eye.
Take part in a successful defense of a capital city by completing at least one mission.
Complete a mission using only Stratagems.
Complete a difficulty 10 or higher mission without a single death.
Complete a difficulty 7 or higher mission against the Cyborgs without taking damage from any enemy.
Kill a Bug Tank, Bug Behemoth, or Cyborg IFV by having the extraction shuttle land on it.
Use the Reinforce Stratagem while downed and the last Helldiver alive on a difficulty 8 or higher mission with 4 players.
Kill a Bug Tank with a Resupply Stratagem Hellpod.
Destroy a Bug Nest, Cyborg AA, or Illuminate Beacon with anything but the NUX-223 Hellbomb.
While in melee range from a Cyborg Warlord, use the "NO" communication command.
Defeat a Cyborg Siegemech.
Complete all missions on a planet with difficulty 10 or higher.
Kill 10,000 enemies.
Take part in a successful final assault on an enemy's home planet by completing at least one mission.
Achieve the rank of Captain (Rank 13).
Play at least once against all enemy races.
Face each new enemy once.
Extract from a difficulty 8 or higher mission with 4 players where all 4 get on the shuttle.
Successfully complete an escort objective where all 4 NPCs survive.
Play at least once on a desert, a forest, and a snow planet.
Kill 7 enemies within a very short time using only your primary weapon.
Do 25 capespins in a row, without moving, while on the ship bridge.
Complete at least one planet in a successful Galactic Campaign.
Achieve the rank of Sergeant (Rank 7).
Complete a volcanic type planet of difficulty 5 or more.
Complete a mission.
Join another game through the matchmaking system.
Customize your character.
Finish the Training.
Kill 100,000 enemies.
Kill a Bug or Illuminate assassination target by running it over with the APC or HAV.
Complete a difficulty 7 or higher mission without triggering any alarms.